Maybe Full Screen toggle add-on is doing that.

Troubleshooting extensions and themes

• https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes

Check and tell if its working.

No joy there.

BTW Full screen toggle is NOT an add-on. It's a standard Firefox feature.

you mentioned in your Question Message that I've added 3 add-on buttons and 1 command-button to the navigation toolbar:

• Web of Trust -> Adblock Plus -> NoScript -> Full Screen toggle

Okay i misunderstood. i thought that you are using some add-on called Full Screen toggle. Sry about that..

Update All your Firefox Plugins

• https://www-trunk.stage.mozilla.com/en-US/plugincheck/
• http://www.mozilla.com/en-US/plugincheck/

Troubleshooting plugins

• https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins

Check and tell if its working.

I already visited all trouble-shooting pages you suggested. None resolved my complaint.

Oh well, I can live with it and I'm already getting used to it. Besides this negligible little quirk, Firefox 6 works very well indeed.

In any case, thank you kindly for your support.

Looks that you have added those buttons to the right of the fullscreenflex hbox that normally causes only the Windows control buttons to be shifted to the right corner.

You can try to remove all those toolbar buttons and re-add them one at a time to see if they still appear at the far right.

See also:

• http://kb.mozillazine.org/Corrupt_localstore.rdf

Thanks, cor-el.

Your note "Looks that you have added those buttons to the right of the fullscreenflex hbox that normally causes only the Windows control buttons to be shifted to the right corner." pointed me to a solution.

I simply put my additional buttons to the left of the navigation bar. See screenshot 3 and screenshot 4

Problem solved. Thanks again.